This application was written to read, insert, update, and delete records from a Davis WeatherLink WLK file. The main function that this application performs that the Davis WeatherLink software does not is the inserting of records. To use the application, place it in the same folder that the wlk files are in. If WeatherLink is currently using the file, you may get an error, so before opening the application, close WeatherLink. When you first open WLKReaderWriter, it will ask you to go to the Setup and Station Info page to fill out a couple of required fields for the THSW Index Calculation. Of course you need a radiation sensor for this calculation also, so if you don't have one, you really don't need to fill out the setup tab. Please backup all WLK files before using this application, I would hate for your data to become corrupted do to an unforeseen error in my application.

New Feature as of April 18, 2006 - Added a Bulk Insert capability. The Bulk Insert Wizard is accessed by going to the Record Times tab and clicking on the Bulk Insert button or going to the File Menu and selecting Bulk Insert. Right now the wizard only handles files that are delimited by a single character such as a comma or tab or anything you want to use. The exported files from WeatherLink use a tab to seperate each field.

New Feature as of August 28, 2007 - Fixed some errors with the Bulk Insert Wizard not importing records correctly. If anyone is still having problems with the imports please contact me here.

The .Net Framework 3.5 or greater is required for this application to run. If you do not have the framework installed, use Windows Update and it should be in the optional section.

This is an fairly new version of the application, so please backup any WLK files you would like to update with this application just in case it gets corrupted. I have tested the application to the best of my ability and it has worked so far, with a couple of minor exceptions:

• There had been a problem with International Dates not working correctly and causing the application to crash. I believe that I have corrected those errors and the application should now work just fine.
• The THSW Index calculation is slightly off from Davis’ calculations by +-5 degrees Fahrenheit. This is only a concern if you have the solar radiation collector which is required to calculate the THSW Index. If this is a concern, you might want to try to insert records and then in WeatherLink edit one of the records, which might reset the THSW Calculations to their true values.
• I also do not update the evapo-transparation value when inputs to individual records are changed. Again this is only a concern if you have the solar radiation collector. (The equation for evapo-transparation is very complicated and I just do not have the time or math knowledge to get it working at this time.)
• The THW Index is very close ( < +- 0.5 degrees Fahrenheit) to Davis’ calculations
• I have not been able to test any files with extra sensors attached, including:
  Extra Temperature, Extra Humidity, Soil Temperature, Soil Moisture, Leaf Temperature, and Leaf Moisture
  These should work, but they have not been tested with real data.

If you use this application and find any other calculations that are not correct or any errors occur while using the application please feel free to report them to me through email. My email address is located on the Developer Information tab once you open the application. I will try my best to create fixes, but remeber this application is being given out for free and I do not always have time to get to every request.

Use the following link to download the application: WLKReaderWriter